ASTM-A20 Standard Specification for General Requirements for Steel Plates for Pressure Vessels ... A841/A841M. Steel Plates, 9 % Nickel Alloy, for Pressure Vessels, ... it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.

This specification is under the jurisdiction of ASTM Committee A01 on Steel, ... a welding procedure suitable for the grade of steel and intended of Steel Products use or service will be utilized. ... A841/A841M Specification for Steel Plates for Pressure and certification. Vessels, Produced by Thermo-Mechanical Control Pro- 3.1.5.1 Discussion ...